Purple Oscillating Steam Engine



 I call this one the Purple Passion Oscillator. It surprised me how fast it ran on 20 pounds of air pressure. I have to limit it to about 10 pounds.



 This is also a PM Research casting kit, like the mill engine, but unlike that one, I mostly stuck to the plans and included hardware. I found that taps and dies for the somewhat odd thread sizes were available from Enco at very reasonable prices. The finish is powder coated with a mix I made up from Caswell Plating using candy apple purple with silver powder added.